diff options
author | Erwin Nindl <nine@wirdorange.org> | 2007-06-22 13:59:20 +0000 |
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committer | Erwin Nindl <nine@wirdorange.org> | 2007-06-22 13:59:20 +0000 |
commit | 0275479cb56c7f562f3513fef66c83fc44d1d8c9 (patch) | |
tree | f6fbb703cebf62d18b05e2a5e7591ac08c5b6702 /srtp/crypto/include/prng.h | |
parent | satp internet draft 00 final ietf version (diff) |
added libsrtp to svn
Diffstat (limited to 'srtp/crypto/include/prng.h')
-rw-r--r-- | srtp/crypto/include/prng.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/srtp/crypto/include/prng.h b/srtp/crypto/include/prng.h new file mode 100644 index 0000000..fb96b5e --- /dev/null +++ b/srtp/crypto/include/prng.h @@ -0,0 +1,54 @@ +/* + * prng.h + * + * pseudorandom source + * + * David A. McGrew + * Cisco Systems, Inc. + */ + +#ifndef PRNG_H +#define PRNG_H + +#include "rand_source.h" /* for rand_source_func_t definition */ +#include "aes.h" /* for aes */ +#include "aes_icm.h" /* for aes ctr */ + +#define MAX_PRNG_OUT_LEN 0xffffffffU + +/* + * x917_prng is an ANSI X9.17-like AES-based PRNG + */ + +typedef struct { + v128_t state; /* state data */ + aes_expanded_key_t key; /* secret key */ + uint32_t octet_count; /* number of octets output since last init */ + rand_source_func_t rand; /* random source for re-initialization */ +} x917_prng_t; + +err_status_t +x917_prng_init(rand_source_func_t random_source); + +err_status_t +x917_prng_get_octet_string(uint8_t *dest, uint32_t len); + + +/* + * ctr_prng is an AES-CTR based PRNG + */ + +typedef struct { + uint32_t octet_count; /* number of octets output since last init */ + aes_icm_ctx_t state; /* state data */ + rand_source_func_t rand; /* random source for re-initialization */ +} ctr_prng_t; + +err_status_t +ctr_prng_init(rand_source_func_t random_source); + +err_status_t +ctr_prng_get_octet_string(void *dest, uint32_t len); + + +#endif |